C
c
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#include <stdio.h>
#define ROWS 3
#define COLS 3
int main() {
int matrix[ROWS][COLS] = {
{1, 2, 3},
{4, 5, 6},
{7, 8, 9}
};
int i, main_diag_sum = 0, secondary_diag_sum = 0;
// Print the matrix
printf("The entered matrix is:\n");
for (i = 0; i < ROWS; i++) {
for (int j = 0; j < COLS; j++) {
printf("%d\t", matrix[i][j]);
}
printf("\n");
}
// Sum of main diagonal elements
for (i = 0; i < ROWS; i++) {
main_diag_sum += matrix[i][i];
}
// Sum of other diagonal elements
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OUTPUT
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